IDENTIFICATION OF COAL SEAMS SPONTANEOUS COMBUSTION BOUNDARY IN XINGMING DISTRICT BY AERIAL PHOTOGRAPHS

Black/white aerial photographs with visible light (1:35,000) are used as main information source to fufil aeroremote sensing survey on scale of 1:50,000 in Xingming district in this investigation. Distribution of burnt rock ignition boundary of coal seams in Xingming district covered an aera of 1, 300 km² have been identified. The first task is to divide marco-lithotype of burnt rocks. The second task is to establish preliminary interpreting indices by means of studying image features of burnt rock and ignition boundary, which is carried out in a known area selected in the light of existed data. The third task is to complete the remote sensing investigation for burnt coal boundary all over the district.